List of proposed state mergers
This is a list of proposed state mergers, including both current and historical proposals originating from sovereign states or organizations. The entities listed below differ from separatist movements in that they would form as a merger or union of two or more existing states, territories, colonies or other regions, becoming either a federation, confederation or other type of unified sovereign state.
Current proposals
| Proposed state | Component states | Continent | First proposed | Notes |
United States of EuropeHistoricalMedieval periodEarly modern period19th century20th century21st century |